What is the effect of temp on metals and semiconductors - Chemistry - States of Matter

Question

What is the effect of temp on metals and semiconductors

Abhishek Dwivedi · Accepted Answer

Dear student Semiconductors: With increase in temperature, the
conductivity of the semi-conductor material increases As with
increase in temperature, outermost electrons acquire energy and
hence by acquiring energy, the outermost electrons leave the shell
of the atom Hence with increase in temperature, number of carriers
in the semiconductor material increases and which leads to increase
in conductivity of the material So we call the semi-conductor
material have negative temperature coefficient i e with increase in
temperature, resistance decreases AND METAL: Restivity is affected
by temperature - for most materials the resistivity increases with
temperature An exception is semiconductors (e g silicon) in which
the resistivity decreases with temperature The ease with which a
material conducts heat is measured by thermal conductivity So with
decrease in temperature, the thermal effect is nullified and the
electrons can flow smoothly without hindrance and thus conductivity
increases Their temperature dependence of conductivity is similar
to metals and semiconductors